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dc.contributor.authorQu, Haimo
dc.contributor.authorLuo, Bingcheng
dc.contributor.authorBian, Shuaishuai
dc.contributor.authorYue, Zhenxing
dc.date.accessioned2020-04-15T15:16:37Z
dc.date.available2020-04-15T15:16:37Z
dc.date.issued2020-04-14
dc.date.submitted2020-02-26
dc.identifier.othermrxab8656
dc.identifier.otherab8656
dc.identifier.othermrx-120964.r2
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/304391
dc.description.abstractAbstract: The strontium titanate (SrTiO3) single crystals with different orientations of (100), (110) and (111) were investigated using thermally stimulated depolarization current (TSDC) measurements, which has been proved to be an effective strategy to fundamentally study the relationship between relaxation phenomena and defect chemistry in dielectrics. The origins of different relaxations in SrTiO3 crystals were identified and the activation energy of oxygen vacancies was estimated from TSDC measurements. It was further found that oxygen-treated SrTiO3 crystals exhibit different relaxation behaviors. Noticeable changes of thermal relaxation associated with oxygen vacancies have taken place in relation to the crystalline anisotropy. The SrTiO3 (110) samples display higher concentration and activation energy of oxygen vacancies. First-principles calculations were carried out on SrTiO3 (110) crystals to study the effect of oxygen vacancy on different surface microstructure. From the resulting minimum formation energy of 0.63 eV, it demonstrates that the oxygen vacancies tend to form on the TiO-terminated surfaces. Considering the band structure, oxygen vacancies near the surface contribute to the transition of crystal from insulator to metallic characteristic.
dc.languageen
dc.publisherIOP Publishing
dc.rightsAttribution 4.0 International (CC BY 4.0)en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectPaper
dc.subjectElectronic materials
dc.subjectSrTiO3
dc.subjectTSDC
dc.subjectfirst-principles
dc.subjectoxygen vacancy
dc.subjectdefect relaxation
dc.titleThermally stimulated relaxation and behaviors of oxygen vacancies in SrTiO 3 single crystals with (100), (110) and (111) orientations
dc.typeArticle
dc.date.updated2020-04-15T15:16:35Z
prism.issueIdentifier4
prism.publicationNameMaterials Research Express
prism.volume7
dc.identifier.doi10.17863/CAM.51473
dcterms.dateAccepted2020-04-03
rioxxterms.versionofrecord10.1088/2053-1591/ab8656
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidQu, Haimo [0000-0002-6762-1130]
dc.identifier.eissn2053-1591
pubs.funder-project-idNational Natural Science Foundation of China (No. 51872160)
pubs.funder-project-idNational Key Research and Development Program of China (No.2017YFB0406301)


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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's licence is described as Attribution 4.0 International (CC BY 4.0)